Speed-governor.



Patented Feb. 25, MMS).

gg @nvm/waff G. W. PERCE.

SPEED GOVERNOR.

APPLicATioN man 35m26.191s.

. UNTTED sTATns TTTTNT oriana.

GEORGE W. PIERCE, 0F ANDERSON, INDIANA, ASSIGNOR TO THE PIERCE GGVERNQR C0.,

v0]? ANDERSON, INDIANA,`A

CORPORATION 0F INDINJ.

SPEED-GOVERNOR.

Speeicetion of Letters Patent.

Application led September 26, 1916. Serial No. 122,198.

To'aZZ 'whom it may concern.-

Be it known that I, GEORGE W. PIERCE, a citizen'of theUnited States, and resident of Anderson, in` theY county of Madison and State of Indiana, have invented certain new and useful Improvements in Speed-Governors, of which the following is a speciiicat1on.

This inventionrelates to certain improvements in speed limiting` devices and more particularly to that type of engine governor disclosed and claimed in my co-.pending application Serial No. 122,197,'iled September 26, 1916.

My present invention involves certain improvements in the means for regulating the tension of the spring which counter-acts the centrifugally actuated device and prevents the operation of the latter below a predetermined speed.

The object of my 'present invention is to so position the spring and so construct the tension regulating means as to permit of a smaller and more compact casing; to more eiliciently seal the spring regulating means;

Aand to more effectively prevent tampering therewith.

Referencel is to 'be had to the accompanyin drawing in which I have illustrated one emi-loodiment of my invention, and in which similar reference characters indicate corresponding parts in the several views. In tlese drawings,

Figure l is a side elevation of a portion of a motor vehicle showing Oneway 'in which w my improved device may be installed;

v'pivoted on Fig. 2 is a central longitudinal section Fig. 3 is a transverse section on the line 343 yof Fig. 2.

Fig; 4 is a section on 'In the specific construction illustrated, I

employ a conduit section 10 provided with a tubular sleeve or extension 11 on one side and integral therewith. Supported by and infaxial alinementwith this extension or sleeve, is a cylindrical casing including two rigidly connected parts 12and 13. Within the casing part 13 is a centrifugally actuated device including a pair of weights 14 the transversely extending arms 15 of a hollow shaft 16. Within the hollow shaft is a pin 17 which has 'one' end in enf gae'ement with inwardly directed lingers or lugs 18 on the weights. Thus, as the weights A shown.

the une 4 4 Fig. e.

swing outwardly under the innuence of eentrifugal force, the pin 17 is moved endwise.

The details of construction herein illustrated are substantially the same as those illustrated inV my copending application above referred to except that the casing is materially shorter and the spider 19 which carries the bearings for one end of the hol- Alow shaft comes closely adjacent the end wall of the casing section 12 by reason of the change in the location and method of adjustment ofthe spring constituting the main features of my present invention. Within the conduit section l0 is a throttle valve 20 and upon the shaft or arbor of the latter is a pinion 2l meshing with a rack bar 22 rigidly connected with the valve rod 23 abutting against the end of the pin 17 The outward movement of the centrifugal weights thus moves the rack bar towardv the left from the position shown in Fig. 2 andv rotates the throttle valve toward closed position..

s an important feature of mypresent -invention, I rigidly connect a sleeve 25 to the opposite end of the extension 1l from the casing and serving to inclose a regulating spring26 and an adjusting device 27.,.for the latter. The outer end of the sleeve 2t' is of slightly reduced diameter and within its' reduced portion is threaded ajpliig 27. This plug is in alinement with the valve rod 23 and the coil spring is mounted between the end of the rack bar and the plug and encircles portions of each so as to remain in place and normally tend to move the rack bar toward the right from the position The plug is shown as being provided with a. collar or flange 28 against which one end ofthe spring may seat.

The outer end of the tension regulating plug 27 is slotted and the portion in which it is mounted is provided with a pair of diametrically opposed apertures 29 which register with the twice during each rotation of the plug. The outer end of the sleeve 25 is provided with a cap 30 which prevents the threads at the end of the plug 27 from being dirt or other foreign substance. It has apertures which mayregister with the aper-V tures 29.

'It will be noted that the spring tends to hold the weights in their inner limiting position and therefore the .ereaterthe tension Patented Fels. 65, i219.

clogged with lili@ lli of the spring the greater will be the speed required to move the Weights outwardly. When it is desired to regulate the tension oit the spring, the cap 30 may be removed and a screw driver inserted in the end ot the sleeve and into the slot of the plug 27 to rotate the latter in either direction. When the desired adjustment has been secured, the plug is left with the slot in registry with. the apertures 29 and the cap 30 is placed in position with its apertures in registry with the apertures 29. Solder may then be poured in through the apertures to positively prevent the removal of the cap or. the rotation of the plug, or instead of using solder, aA vWire may be threaded through the apertures and slot and its ends may he connected together by a lead seal or in any other suitable manner.; t will be noted that the Wire not only prevents the removal Aof the cap but also prevents any accidental rotation of the tension regulatinplug.

he spring operates by compression rather than by tension as in the device shown in my companion application, and as it comes at the opposite side of the device from the casing, it is more readily accessible. Furthermore, a screw driver may readily he applied to adjust the position of Athe plug when required. l

Various changes in the details of con* struction may be made Withinl the spirit of my invention and Without departing from the scope of the appended claims.

Having thus described my invention, what l claim as new and desire to secure by Let ters Patent is:

`1. A speed limiting device including a vinstaan the end of said casing and having an aperm ture adapted to register with the aperture of said casing, and means extending throughy i said aperturesand said slot for preventing removal of said cap and rotation of said plug. n l

2. A speed limiting device including a casin a throttle valve, a longitudinally' Inova le rod, connections' between said rod and said valve for turning' the latter, a thrust member supported in said casing in' alinement with saio. rod, a thrust snring hetween said thrust member and said rod, said thrust member being rotatably adjustable in the casing' to vary the tension oir' said surfing, a cap on the casing concealing, the

t rust member, said thrust member, cap and said casing being formed with transverse apertures, one in the form or a slot and. another in the form of perorations adapted to register therewith in certain positions of rotation. ot said thrust member and cap, means adapted to extend through the registering apertures for locking said thrust member and cap against rotation, `a ceni trifugally operated device for iongitudinally moving Isaid rod, anddriving means.

connected at the outer end of said centrifugally operated device.

Si ned iat Anderson, in the county of Madison and State of indiana, lthis 5th day of September, A. D. 19'16.

oponen vv; Pianos.

Witnesses: v

N. M. Mo'dnnicnen, l?. E, Muenzen. 

